Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

5. Integumentary System

The Hypodermis

Anatomy & Physiology

5. Integumentary System

The Hypodermis

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Multiple Choice

The reason the hypodermis acts as a shock absorber is that:

it is composed primarily of dense irregular connective tissue

it has a high concentration of collagen fibers

it contains a large amount of adipose tissue

it is rich in blood vessels and nerves

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Verified step by step guidance

Understand the structure and function of the hypodermis: The hypodermis, also known as the subcutaneous layer, is the deepest layer of the skin. It primarily consists of adipose tissue and connective tissue, which play key roles in insulation, energy storage, and shock absorption.

Analyze the properties of adipose tissue: Adipose tissue is specialized for storing fat. Its composition includes fat cells (adipocytes) that are surrounded by a matrix. The fat within these cells provides cushioning and absorbs mechanical forces, making it an effective shock absorber.

Compare the options provided: Dense irregular connective tissue is primarily responsible for providing strength and resistance to stretching, not shock absorption. Collagen fibers contribute to structural integrity but do not serve as shock absorbers. Blood vessels and nerves are important for nutrient delivery and sensory functions but do not directly contribute to shock absorption.

Identify the correct answer based on the function of adipose tissue: Since adipose tissue is designed to cushion and absorb mechanical forces, the correct answer is that the hypodermis acts as a shock absorber because it contains a large amount of adipose tissue.

Conclude the reasoning: The hypodermis's composition of adipose tissue is key to its role in shock absorption, as the fat stored in adipocytes provides the necessary cushioning to protect underlying structures from mechanical stress.